3-phase 400V supply to control a 240V motor
3-phase 400V supply to control a 240V motor
(OP)
Hello,
I have a machine with a supply voltage of 230V single phase. The motor speed is contolled by 1 scr which is placed in the phase.(neutral directly to the motor). Cause the machine needs a 70amp fuse I want to convert is to a 3phase 400V supply. Cause I have to convert more of these machines it need to be as simple as possible, I can't change the motor and a transformator is too big to place into the machine. How can I change the motor control?
I have a machine with a supply voltage of 230V single phase. The motor speed is contolled by 1 scr which is placed in the phase.(neutral directly to the motor). Cause the machine needs a 70amp fuse I want to convert is to a 3phase 400V supply. Cause I have to convert more of these machines it need to be as simple as possible, I can't change the motor and a transformator is too big to place into the machine. How can I change the motor control?





RE: 3-phase 400V supply to control a 240V motor
Nowhere else to go without a transformer or changing or rewinding the motor.
Bill
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"Why not the best?"
Jimmy Carter
RE: 3-phase 400V supply to control a 240V motor
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: 3-phase 400V supply to control a 240V motor
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: 3-phase 400V supply to control a 240V motor
I guess your motor is a DC motor of 10-15 kw 230 V dc supplied through a SCR controller. You may supply this motor from a three phase source:see the attachment
If is a DC motor
See
ht
ht
But if is an induction motor then see:
www.
Best Regards
RE: 3-phase 400V supply to control a 240V motor
The 70amp fuse is needed for the whole machine, but the main part of the drawn current is needed for the motor(s), which are 7 groups of 2 in serie 110V AC motrs. Te rest is just a little power supply for some pcb's and a litlle LCD display. Then SCR is placed in the feed cable towards a box at the back of the machine where the wiring is made to the motors. Changing the wiring is possible if no other option is possible, but first like to get an idea of the 'other' solutions.